CNN did a most excellent 4h documentary on the science of happiness…and Laughter Yoga in the fall of 2006. (we know it very well because we were instrumental in making it happen – we convinced them to come and film on location at the first 2006 All America Laughter Yoga Conference that we organized in Escondido, CA). Here is the best summary video we have found on this so far (very good synthesis). Enjoy!